Mockitoアノテーション（@Mockや@InjectMocksや@Spyなど）が付与されているフィールドに対して初期化処理をする必要があります。 Mockitoで言う初期化とは、モックオブジェクトを生成すること です（アノテーションをつけただけで、mockメソッドは書いていません。Spring5的新特性，整合JUnit5时出现空指针异常 1、分析 测试中调用的方法出现空指针异常 单元测试中调用方法的对象出现空指针异常 2、本次空指针异常是调用方法的对象出现空指针异常 原因使用了JUnit5的注解应用（@ExtendWith(SpringExtension. 被测试类上标记@InjectMocks，Mockito就会实例化该类，并将标记@Mock、@Spy注解的属性值注入到被测试类中。 注意 @InjectMocks的注入顺序： 如果这里的TargetClass中没有显示定义构造方法，Mockito会调用默认构造函数实例化对象，然后依次寻找setter 方法 或 属性（按Mock. initMocks (this) to your @Before method. Makes the test class more readable. You should use a getter there:While using @Mock, @InjectMocks, test cases need to be run using MockitoJUnitRunner. @InjectMocks works as a sort of stand-in dependency injection for the system under test: If you have a test that defines a @Mock or @Spy of the right type, Mockito will initialize any fields in your @InjectMocks instance with the contents of. @InjectMocks decouples a test from changes to the constructor. 1 Answer. It needs concrete class to work with. The @InjectMocks annotation makes it easier and cleaner to inject mocks into your code. Mockito Extension. But if it fails to inject, that will not report failure :We would like to show you a description here but the site won’t allow us. The @mock annotation is often used to create and inject Mock instances. Mockito Extension. As Mockito cannot spy on an interface, use a concrete implementation, for example ArrayList. JUnit 5 has a powerful extension model and Mockito recently published one under the group / artifact ID org. I. You can't instantiate an interface in Java. Use @Mock and @InjectMocks for running tests without a Spring context, this is preferred as it's much faster. 19. exceptions. Unfortunately it fails: as soon as you run the test, Mockito throws a runtime exception: “Cannot instantiate @InjectMocks field named ‘waitress’! Cause: the type ‘KitchenStaff’ is an. I'd like to run MockMvc tests to perform controller integration tests, but want to override the. 或者也. To enable Mockito annotations (such as @Spy, @Mock,. Fancy getting world-wide. class); one = Mockito. No need to use @Before since you used field injection. when (MockedClass. You can use MockitoJUnitRunner to mock in unit tests. From the InjectMocks javadoc (emphasis is not mine!) : Mockito will try to inject mocks only either by constructor injection, setter injection, or property injection in order and as described below. In this post, We will learn about @InjectMocks Annotation in Mockito with Example. Contribute to hehonghui/mockito-doc-zh development by creating an account on GitHub. 提供了一种对真实对象操作的方法. @InjectMocks: automatically inject mocks/spies fields annotated with @Spy or @Mock -- 这句话理解意思是它会把上下文中你标记为@Spy和@Mock的对象都自动注解进去。 是不是就相当于把实现类中的私有成员属性（比如ReportMediaDayMapper的依赖 ）给偷梁换柱了Jun 6, 2014 at 1:13. 问题的表现： 在写单元测试的时候，我们有时候需要使用假的数据来确保单元测试覆盖率达标，这时我们可能会对以下注解，结合使用，确保达到自己想要的效果（具体如何使用不再介绍）。All groups and messages. class) public class aTest () { @Mock private B b; @Mock. How to call the actual service layer method using my ServiceTest class, If i mock the ServiceTest class then it's object wont execute the actual service method code because it wont get the object to call it's methods and if I try with the Spy still it was not working, I. So yes this is the combination of @InjectMocks and @Spy an undocumented feature, understand not promoted feature. I'm writing junit and I using @mock and @injectMock. A spy in mockito is a partial mock in other mocking frameworks (part of the object will be mocked and part will use real method invocations). mockito. class) 或 Mockito. @RunWith (MockitoJUnitRunner. txt","path":"HowToJunit. @Mocked will mock all class methods and constructors on every instance created inside the test context. Mockito关于抽象类的问题. get ()) will cause a NullPointerException because myService. Using @InjectMocks annotation. The JUnit 5 extension provided by the @Testcontainers annotation scans for any containers declared with the @Container annotation, and then starts and stops the those containers for your tests. doAnswer (): We can use this to perform some operations when a mocked object method is called that is returning void. getOfficeDAO () you have NPE. mock (Map. ここではmock化したクラスに依存しているテスト対象のクラスを取り扱います。 今回はfcというインスタンス変数でインスタンスを宣言しています。 @Before. mock (Map. 使用 @InjectMocks. class) to @RunWith (MockitoJUnitRunner. class) class UserServiceTest { @Mock private. a = mock (A. @Spy and @InjectMocks cannot be used well together (see Google Code issue #489 and GitHub issue #169), and for what they do it is not clear or common that they should be used together at all. In my Junit I am using powermock with mockito and did something like this. Something like this: public interface MyDependency { public int otherMethod (); } public class MyHandler { @AutoWired private MyDependency myDependency; public void someMethod () {. We can configure/override the behavior of a method using the same syntax we would use with a mock. Spring Boot Testing Tutorial - Unit Testing with Junit 5 and Mockito - Spring Boot Testing Tutorial - Part 1, in this article series, we are going to learn about Unit Testing Spring Boot application using Junit 5 and we will see how to use Mocking frameworks like Mockito. Here is the class under test: import java. class) public class CustomerStatementServiceTests { @InjectMocks private BBServiceImpl bbService. キレイでシンプルなAPIでモックを扱うテストコードを記述. このチュートリアルでは、 annotations of the Mockito library – @Mock 、 @Spy 、 @Captor 、および @InjectMocks について説明します。. The @InjectMocks annotation is used to inject mock objects into the class under test. The @InjectMocks annotation makes it easier and cleaner to inject mocks into your code. 但是我还是经常用到@InjectMocks，或者@Mockbean，因为我用的时候JUnit. @Mock creates a mock. For those of you who never used. Mockito其实提供了一个非常方便的注解叫做@InjectMocks，该注解会自动把该单元测试中声明的Mock对象注入到该Bean中。 但是，我在实验的过程中遇到了问题，即 @InjectMocks 如果想要标记在接口上，则该接口必须手动初始化，否则会抛出无法初始化接. In this case it's probably best to mock the injected bean via your Spring test context configuration. mockito </groupId> <artifactId> mockito-junit. . exceptions. JUnitのテストの階層化と@InjectMocks. @InjectMocks is used to create class instances that need to be tested in the test class. You haven't provided the instance at field declaration so I tried to construct the instance. initMocks (this) 去初始化这个被注解标注的字段. This tutorial will teach you how to enable Mockito framework in your Spring Boot project and in addition. Oct 21, 2020 at 10:17. 4k次。在下边的Mock测试中，mock了前端请求，mock后端返回响应，Mockmvc会向发出. Make sure what is returned by Client. Other solution I found is using java sintax instead annotation to make the @Spy object injected. We’ll include this dependency in our pom. @Mock：创建一个Mock。. 7 Tóm lược. 2. class, Answers. otherMethod (); } } I also met this issue during the unit testing with Spring boot framework, but I found one solution for using both @Spy and @InjectMocks. @InjectMocks works as a sort of stand-in dependency. x (this is the default when using Spring boot 1. 1. Unit tests tend to. Something like this: public interface MyDependency { public int otherMethod (); } public class MyHandler { @AutoWired private MyDependency myDependency; public void someMethod () { myDependency. For Junit 5 you can use. helpMeOut (); service. digiandroidapp. Thanks for the suggestions!. @Test void fooTest () { System. 1 Answer. 在这个示例中，我们使用了@RunWith(MockitoJUnitRunner. See here for further reading. @InjectMocks: 创建一个实例，简单的说是这个Mock可以调用真实代码的方法，其余用@Mock（或@Spy）注解创建的mock将被注入到用该实例中。. Following code snippet shows how to use the @InjectMocks annotation: @Captor: It allows the creation of a field-level argument captor. Used By. Trong bài viết này mình sẽ trình bày về những annotations của thư viện Mockito : @Mock, @Spy, @Captor, và @InjectMocks. Unfortunately it fails: as soon as you run the test, Mockito throws a runtime exception: “Cannot instantiate @InjectMocks field named ‘waitress’! Cause: the type ‘KitchenStaff’ is an. Teams. 7. When registered by type, any existing single bean of a matching type (including subclasses) in. Try to install that jar in your local . MockitoAnnotations. 2022年11月6日 2022年12月25日. injectmocks (One. Date; public class Parent{ private. 它将返回抽象方法的模拟，并将调用具体方法的实际方法。. mockito package for your next Mockito project? LambdaTest Automation Testing Advisor has code examples of InjectMocks class to help you get started, for free. mock ()の違いを調べたので備忘録を兼ねてまとめておきます。. CALLS_REAL_METHODS); @MockBean private MamApiDao mamApiDao; @BeforeEach void setUp () { MockitoAnnotations. plan are not getting fetched from the configuration file. In Mockito, we need to create the class object being tested and then mock in its dependencies to fully test the behavior. initMocks (this) to initialize these mocks and inject them (JUnit 4). If any of the following strategy fail, then Mockito won't report failure; i. @InjectMocks private RegistrationController controller; @Mock private FormFactory formFactory; @Spy private RegistrationIpCache registrationIpCache; But be aware that in this case @Spy will try to use default constructor. @Before public void init () { MockitoAnnotations. public class. Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". So remove mocking. Annotated class to be tested dependencies with @Mock annotation. 4. Springで開発していると、テストを書くときにmockを注入したくなります。. And check that your Unit under test works as expected with given data. @RunWith (MockitoJUnitRunner. when we write a unit test for somebusinessimpl, we will want to use a mock. If you are using. @ExtendWith (MockitoExtension. findById (id). class) instead of @SpringBootTest. mockito. pom (858 bytes) jar (1. 在test类执行前（@Before），使用Mockito API设置调用某个方法的返回值 (你预期得到的返回结果)，在Test类中调用这个方法时就会返回所指定的值. serviceA首先使用@MockBean注解，将serviceA模拟为Mock Bean，它将在spring上下文初始化时就替换掉原有Bean. You should mock out implementation details and focus on the expected behaviour of the application. Writing the Test. internal. 重置模拟Study with Quizlet and memorize flashcards containing terms like Serial, Composite key, ACID and more. exceptions. Consider we have a Car and a Driver class: Copy. @AutoConfigureMockMvc @SpringBootTest class GoodsControllerTest { @InjectMocks @Autowired private GoodsController goodsController; @Autowired private MockMvc mockMvc; @Mock GoodsService goodsService; @BeforeEach public void setUp() { MockitoAnnotations. getArticles2 ()を最も初歩的な形でモック化してみる。. mockito. Check this link for more details. In you're example when (myService. Please take a look at this explanation: Difference between @Mock, @MockBean and Mockito. – Dawood ibn Kareem. @ExtendWith (MockitoExtension. The latest versions of junit-jupiter-engine and mockito-core can be downloaded from Maven Central. Mockito框架中文文档. 使用JUnit5我们用@ExtendWith (MockitoExtension. Mocking autowired dependencies with Mockito. @InjectMocks，将. Difference between @Mock and @InjectMocks In the context of testing with the Mockito framework, the @Mock annotation is used to create a mock object of a class or interface,. class) to the test class and annotating mocked fields with @Mock. But if we are using annotation based dependency injection in our classes using spring then our A class will look something like. @InjectMock creates the mock object of the class and injects the mocks that. Spies, on the other hand, provides a way to spy on a real object. @ the Mock. This is my first junit tests using Mockito. 13. One option is create mocks for all intermediate return values and stub them before use. @InjectMocks will only do one of constructor injection or property injection, not both. Overview In this tutorial, we’ll discuss how to use dependency injection to insert Mockito mocks into Spring Beans for unit testing. 注意：必须使用 @RunWith (MockitoJUnitRunner. Constructor Based Injection – when there is a constructor defined for the class, Mockito tries to inject. Note: There is a new version for this artifact. Such a scenario came to us when we had to test Ehcache. 方法1：给被测类添加@RunWith (MockitoJUnitRunner. 后来在stackoverflow上看到一个问答简单明了的解释了这两个注解在定义上的区别：. 14,782 artifacts. そもそもなんでコンストラクタインジェクションが推奨されている. getArticles ()とspringService1. Replace @RunWith (SpringRunner. public class HogeService { @Autowired private HogeDao dao; //これをモックにしてテストしたい } JUnitでテストを階層化するやり方でよく知られているのは、Enclosed. If you are not able to do that easily, you can using Springs ReflectionTestUtils class to mock individual objects in your service. @Spy private MockObject1 mockObject1 = new MockObject1 (); @InjectMocks //if MockObject2 has a MockObject1, then it will be injected here. 因此需要在checkConfirmPayService中对. FieldSetter; new FieldSetter (client, Client. example. The @InjectMocks annotation is available in the org. 可以使用 MockitoRule来实现. I am using latest Springboot for my project. class)注解来启用Mockito框架的支持。这个注解会为我们自动初始化模拟对象和被测对象。 使用@Mock注解，我们创建了名为accountRepositoryMock和notificationServiceMock的模拟对象。使用@InjectMocks注解，我们将这些模拟对象注入到accountService对象中。概要. First of all , the test is incorrect. The @InjectMocks annotation is used to insert all dependencies into the test class. The @InjectMocks annotation creates an instance of the class and injects all the necessary mocks, that are created with the @Mock annotations, to that instance. getListWithData (inputData) is null - it has not been stubbed before. class. Project Structure -> Project Settings->Project SDK and Project Language Level. ), we need to use @ExtendWith (MockitoExtension. @Spy @InjectMocks private MySpy spy; Because InjectMocks need to have instance created, so the solution works for me is at below, @Spy @InjectMocks private MySpy spy = new MySpy(); @InjectMocks：创建一个实例，并将@Mock（或@Spy）注解创建的mock注入到用该实例中。 和之前的代码相比，在使用了这两个注解之后，setup()方法也发生了变化。额外增加了以下这样一行代码。 MockitoAnnotations. springframework. class, nodes); // or whatever equivalent methods are one. No i'm not using spring to set the customService value for tests but in the actual application i'm using spring to set the. This way you do not need to alter your test subject solely for test purposes. And the WCM IO testing library to register the OSGI service into the calling container, Here's some example code:测试类中用@InjectMocks修饰在DictTypeServiceImpl上，那么@Mock或者@Spy修饰的对象会注入到@InjectMocks修饰的对象里。 注意@InjectMocks修饰在实现类上，而不是DictTypeService接口层，这. Читать ещё Still on Mockito 1. These required objects should be defined as mocks. Here we will create a Spring application to test Spring SpringExtension class with JUnit. *initMocks*(this); 也就是实现了对上述mock的初始化工作。2. when (dictionary). 1. It is important as well that the private methods are not doing core testing logic in your java project. @InjectMocks creates an instance of the class and injects the mocks that are created with the @Mock annotations into this instance. Add @Spy to inject real object. 39. Because your constructor is trying to get implementation from factory: Client. The problem is that Mockito is looking for a call of method () with the arguments String and SomeParam, whereas the actual call was with a String and null. 使用Mock打桩的为MyRepository，原本以为使用InjectMocks后，MyService会自动注入MyRepository，MyController会自动注入前的MyService，但是结果并不是这样的。MyController认不到MyService。MyController实例后，没有给myService属性赋值。看起来InjectMocks只能使用Mock注解的。springboot单元测试时@InjectMocks失效. md","path. When i remove @Value annotation from my service class ShiftPlanService. . doThrow (): We can use doThrow () when we want to stub a void method that throws exception. @InjectMocks DataMigrationService dataMigrationService = new DataMigrationService (); Thank You @Srikanth, that was it. This video explains how to get the Service layer alone in our Spring Boot Application. Solution: Approach1: 1) Directly call the exchange method using RestTemplate object. toString (). 1,221 9 26 37. 「 Spring BootのRESTControllerをJUnit4でテストする 」にも書きましたが、サービスクラスで使用して. I think it would be better to do a proper dependency injection via constructor so you can have it declared as final in TestController. Spring Boot’s @MockBean Annotation. @Before public void init () { MockitoAnnotations. newで生成されたインスタンスはSpringの管理対象ではなくなるので、@Autowiredなど便利なアノテーションが効かなくなります。. There are three different ways of using Mockito with JUnit 5. Still on Mockito 1. public class Token{ //setters getters and logic } public class TokenManager{ public Token getToken(){ //Some logic to return token } } public class MyClass { private TokenManager tmgr; public MyClass(TokenManager tmgr){ this. @InjectMocks：创建一个实例，其余用@Mock（或@Spy）注解创建的mock将被注入到用该实例中。. class) that initializes mocks and handles strict stubbings. creepcheck 回复 herriman: @MockBean我觉得你理解的很对，@Mock一般和@InjectMocks成对用，应该就是你说的@InjectMocks会注入@Mock的bean。. (引数が固定値) when (). @RunWith (MockitoJUnitRunner. 因此，Mockito提供了更简单的测试代码，更容易理解、更容易阅读和修改。Mockito还可以用于其他测试框架，如JUnit和TestNG。因此，在本文中，我们将讨论两者之间的区别 @Mock and @InjectMocks 这是在Mockito框架中可用的两个最重要也最令人困惑的注释。 主要区别 This happens when you use @Spy on a class that has no no-args constructors. @InjectMocks @InjectMocks is the Mockito Annotation. java and just initialize the values there with the required values,the test. get ("key); Assert. 3. java unit-testing. The mapper field is private and needs to be set during unit test setup. The algorithm it uses to resolved the implementation is by field name of the injected dependency. Annotation Type InjectMocks. getArticles2 ()を最も初歩的な形でモック化してみる。. viewmodel. id}")private String. I am using @InjectMocks to inject Repository Implementation into my Test class, but it throws InjectMocksException. Note 2: If @InjectMocks instance wasn't initialized before and have a no-arg constructor, then it will be initialized with this constructor. You haven't provided the instance at field declaration so I tried to construct the instance. However, there is some differences which I have outlined below. class) public class EmployeeServiceTests { @Mock private EmployeeRepository repository; @InjectMocks private EmployeeService service = new EmployeeServiceImpl (repository); // need to declare an appropriate constructor in the. Hope that helps これらのアノテーションを利用することで、Autowiredされるクラスの状態をモックオブジェクトで制御することができるようになり、単体テストや下位層が未完成あるいはテストで呼び出されるべきではない場合などに役立ちます。. 因此，Mockito提供了更简单的测试代码，更容易理解、更容易阅读和修改。Mockito还可以用于其他测试框架，如JUnit和TestNG。因此，在本文中，我们将讨论两者之间的区别 @Mock and @InjectMocks 这是在Mockito框架中可用的两个最重要也最令人困惑的注释。 主要区别You have to use both @Spy and @InjectMocks. answered. Its a bad practice to use new and initialize classes (better to go for dependency injection) or to introduce setters for your injections. I need to mock those 4 objects, so I annotated them with @Mock in my test class and then annotated the tested class with @InjectMocks. In this case it will choose the biggest constructor. Your mockProductManager is actually not a mock but an instance of ProductManager class. junit. @Mock アノテーションで宣言する @Mock で宣言したMockオブジェクトは、 openMocks()メソッドを使って初期化を行う必要がある。 更にこのメソッドの戻り値がAutoCloseableオブジェクトとなるので、テスト終了時に close()メソッドを実行する。. Sorted by: 5. 使用Mockito创建mock对象. Yes, the @InjectMocks annotation makes Mockito EITHER do constructor injection, OR setter/field injection, but NEVER both. Got an error: org. @Mock creates a mock. 🕘Timestamps:0:10 - Introduction💛. CALLS_REAL_METHODS) private. ③-2 - モックにテスト用戻り値を設定する。. io mockとは Mockitoでは、インターフェース…实现动态高度下的不同样式展现. println ("A's method called"); b. Mockitoはテストの際に何度も使ったことがあるが、mockやspy, injectmocks等の用語の意味をなんとなくでしか理解しておらず、使う際に何度も詰まってしまっていた。このたび、公式ドキュメントを改めて読み直してみたのでまとめておく。 javadoc. base. class) I was facing the same issue but after implementing the above steps it worked for me. However, there is some differences which I have outlined below. Q&A for work. x requires Java 8, but otherwise doesn’t introduce any. The following sample code shows how @Mock and @InjectMocks works. thenReturn () whenever asking for the mocked object from the class spyed on. Mockito’s @InjectMocks annotation usually allows us to inject mocked dependencies in the annotated class mocked object. The example Translator class does not rely on injection for the TranslatorWebService dependency; instead, it obtains it directly through. Mockito enables partial mocking of an object, allowing us to create a mock object while still invoking a real method. Nov 17, 2015 at 11:37. 3. QuarkusMock. @ RunWith(SpringRunner. class) Mockito에서 제공하는 목객체를 사용하기 하기위해 위와같은 어노테이션을 테스트클래스에 달아준다. So your code above will resolve correctly ( b2 => @Mock private. 1. 1 Answer. mockito. I am not sure with PostConstruct specifically, but this generally works: // Create a mock of Resource to change its behaviour for testing @Mock private Resource resource; // Testing instance, mocked `resource` should be injected here @InjectMocks @Resource private TestedClass testedClass; @Before public void. @injectmocks is necessary for injecting both @spy and @mock instances. The Business Logic. 10 hours ago2023 mock draft latest call: They make tests more readable. Mockito will try to inject mocks only either by constructor injection, setter injection, or property injection in order. 6 Answers. I have been using InjectMocks and Spy annotations of mockito for the purpose mocking my objects and it used to work fine. I'm facing the issue of NPE for the service that was used in @InjectMocks. Its a bad practice to use new and initialize classes (better to go for dependency injection) or to introduce setters for your injections. 1. 1) Adding @RunWith (org. 8. @Spy，被标注的属性是个spy，需要赋予一个instance。. This is fine for integration testing, which is out of scope. テストでモックオブジェクトを直感的に操作できるのを目的として開発されています。. You haven't provided the instance at field declaration so I tried to construct the instance. This can be solved by following my solution. It's been a while, but if you want to mockInject an OSGI service into your underTest object, then you must use MockitoExtension, so you can @injectMocks. Annotation Type InjectMocks. @InjectMocks doesn't work on interface. 概要. In well-written Mockito usage, you generally should not even want to apply them to the same object. In well-written Mockito usage, you generally should not even want to apply them to the same object. 9. I got this weird behavior, the @Mockbean / @SpyBean are correctly injected but in the test class its values are null !! and I can't run Mockito functions verify or when. getDaoFactory (). Sorted by: 5. 이 글에서는 Mockito의 Annotation, `@Mock`, `@Spy`, `@Captor`, `@InjectMocks`를 사용하는 방법에 대해서 알아봅니다. @InjectMocks wasn't really developed to work with other dependency injection frameworks, as the development was driven by unit test use cases, not integration tests. 1. You might want to take a look at springockito, which is another project that tries to ease Mockito mock creation in Spring. 0. For those of you who never used. mockito. When using @InjectMocks, it automatically tries to inject in the order: constructor, setter, field. It just won't work with mocks created by the mock method. import org. Java – 理解 @ExtendWith (SpringExtension. Add a comment. During test setup add the mocks to the List spy. 4. The @InjectMocks annotation creates an instance of the class and injects all the necessary mocks, that are created with the @Mock annotations, to that instance. Enable Mockito Annotations. 11 1. 2. 1. 5. That will create an instance of the class under test as well as inject the mock objects into it. public class MyServiceImplTest { private MyDataService myDataService; private NyService myService; @Mock private MyRepository myRepository; @Before public void. SpringExtension is used with JUnit 5 Jupiter @ExtendWith annotation as following. g. When setting up a test using @InjectMocks and this fails, MockitoExtension fails in teardown with a nullpointerexception, instead of calling finishMocking(). – me1111. 注意：必须使用@RunWith (MockitoJUnitRunner. 具体的に言うと、以下の状態で@Autowiredしてもnullになります。. We can specify the mock objects to be injected using @Mock. @Injectable mocks a single instance (e. As you can notice I initialize an instance variable inside the constructor using a method from a service class called ExternalService which is Autowired. Trước tiên - hãy xem cách cho phép sử dụng annotation với Mockito tests. Our insights pan across engineering, digital learning, digital commerce, machine learning, and mobile solutions. you will have to provide dependencies yourself. Alsoi runnig the bean injection also. mockito </groupId> <artifactId> mockito-junit. Maven Dependencies. getArticles ()とspringService1. xml: <dependency> <groupId> org. @InjectMocks：创建一个实例，并将@Mock（或@Spy）注解创建的mock注入到用该实例中。 和之前的代码相比，在使用了这两个注解之后，setup()方法也发生了变化。额外增加了以下这样一行代码。 MockitoAnnotations. public class OneTest { private One one; @Test public void testAddNode () { Map<String, String> nodes = Mockito. Mockito @InjectMocks annotations allow us to inject mocked dependencies in the annotated class mocked object. Follow edited Feb 17, 2021 at 1:43. Improve this answer. 12 When I use @InjectMocks, an exception was occurred. partner. 1. a test method's parameter).